Gulp livereload on client changes and nodemon on server changes
Doc update and npm scripts update
Merge pull request #10 from fritzo/feature-livereload

Livereload on client changes and Nodemon on server changes:

  - reloads on changes to server code
  - refreshes browser on changes to client code
  - builds with JS sourcemaps

         npm run dev             # alias for gulp serve --dev=true